ESE a deep groove ball bearing installation method: press-fit: the bearing inner ring and the shaft so that a tight fit, the outer ring with the bearing hole is relatively loose fit available presses will be pressed on the shaft bearing and the shaft together with Together bearing load bearing hole, when the pressure mounted on the inner end surface of the bearing pad made of a soft metal material assembly sleeve (copper or soft steel), bearing outer ring with the bearing hole tight fit, the inner ring and the shaft When compared with a loose fit, for the bearing can be pressed into the bearing hole, then assemble the outer diameter of the sleeve seat should be slightly smaller than the diameter of the hole. If the bearing ring and the housing bore and shaft are a tight fit, install indoor lap and the outer ring to be simultaneously pressed into the shaft and housing bore, the assembly casing structure should be able to simultaneously charge the end face of tight bearing inner and outer rings.
ESE deep groove ball bearing installation method II: heating with: by heating bearings or bearing, the use of thermal expansion a tight fit into a song with the installation method is a commonly used method of installation and labor-saving This method is suitable for comparing the amount of interference large bearings before installing thermal loading the bearing or separable bearing rings into the tank uniform heating 80-100 ℃, then remove from the oil loaded onto the shaft as quickly as possible in order to prevent the cooling face and the inner shaft shoulder fit is not tight, it can then tighten the rear bearing axial cooling. When the bearing outer ring and light metal bearing tight fit, the use of heating equipment bearing thermal method, can be avoided with the surface by scratches. When the tank is heated by bearing a certain distance away from the bottom of the gate should have a net, or with a hook hanging bearings, can not be put on the bottom to prevent impurities entering the bearing Shen or uneven heating, the tank must have a thermometer, strict control of the oil temperature must not exceed 100 ℃, in order to prevent tempering effect, reduce the hardness of the rings.Tolerance
ESE standard deep groove ball bearings with a general level, all consistent with GB307.1.Clearance
ESE standard deep groove ball bearings with C2, standard (CN), C3, C4 and C5 level internal clearance, all consistent with the GB4604.Cage
ESE deep groove ball bearings generally use pressed steel cage or solid brass cage. When the outer diameter of less than 400 mm, the use of steel stamping cage without post code, when the outer diameter greater than 400 mm multi-purpose solid brass cage without post code.
Bearing three process forms
Processed form ESE deep groove ball bearing parts are as follows:
1, multi-step process: the general bearing production processes require 20 to 40, and more than 70 channels.
2. Forming: work surface bearing parts are rotary forming surface, suitable for use molding process.
3, precision machining: the vast majority of the surface of the bearing parts subjected to grinding, grinding dimensions and geometric precision are in μm units.Note issue
ESE deep groove ball bearings, bearing load operation is too small, resulting in slippage between the ball and raceway will become a cause scratches. Especially large weight ball and cage large ESE deep groove ball bearings have this tendency. Is expected to be in use, the load is too small, when selecting the bearing should promptly contact the relevant personnel!Causes of corrosion
In many cases, bearing corrosion phenomenon occurs, the cause of bearing corrosion There are many in our daily lives the most common are the following factors.
1) due to poor sealing means being intrusive moisture, dirt and so on;
2) bearing long-term need, more than rust, lack of maintenance.
3) the metal surface roughness greater;
4) contact with corrosive chemical media, bearing cleaning is not clean, surface dirt buildup, or sweat hand contact bearings, bearing after cleaning, packaging or installation is not timely, long-term exposure to the air, water and attacked by air contamination;
5) the ambient temperature and humidity, and exposure to various environmental media; rust inhibitor failure or quality does not match the requirements.Deep groove ball suffix meaning
1. CN: Normal radial clearance; generally used only in combination with the following letters to represent a narrow range or offset clearance
● H: narrowing the range of clearance, the equivalent of half of the original clearance range
● L: narrowing the range of clearance, clearance equivalent to the lower half of the original range of points
● P: offset clearance range, the lower range of clearance equivalent to the original clearance range of the upper half and the next component of the composition
A combination of the above applies to both the letter and the following groups to the corresponding clearance significance: C2, C3, C4, and C5, such as C2
2. C2: radial clearance less than ordinary group
3. C3: radial clearance greater than Normal
4. C4: radial clearance greater than C3
5. C5: radial clearance greater than C4
6. DB: two back to back manner paired single row deep groove ball bearings ESE
7. DF: face to face manner two paired single row deep groove ball bearings ESE
8. DT: two in series ESE paired single row deep groove ball bearings
9. E: Strengthening Design
10. GJN: Polyurea Grease, NLGI consistency 2, the temperature range of -30 to +150 degrees (standard filling amount)
11. GXN: Polyurea Grease, NLGI consistency 2, the temperature range of -40 to +150 degrees (standard filling amount)
12. J: pressed steel cage
13. LHT23: lithium grease, NLGI consistency 2, the temperature range of -50 to +140 degrees (standard filling amount)
14. LT: lithium grease, NLGI consistency 2, the temperature range of -55 to +110 degrees (standard filling amount)
15. LT10: lithium grease, NLGI consistency 2, the temperature range of -50 to +90 degrees (standard fill charge)
16. M: machined brass cage, ball guide. Different designs and materials after M plus digital ID, such as M2
17. MA: machined brass cage, outer boot
18. MB: machined brass cage, inner guide
19. MT33: lithium grease, NLGI consistency 3, the temperature range of -30 to +120 degrees (standard filling amount)
20. MT47: lithium grease, NLGI consistency 2, the temperature range of -30 to +110 degrees (standard filling amount)
21. N: outer ring with snap groove
22. NR: outer ring with snap ring groove and snap ring
23. N1: the outer side of the groove (with stopper means for preventing rotation of the outer ring)
24. P5: dimensional accuracy and rotational accuracy to ISO tolerance class 5
25. P6: the dimensional accuracy and rotational accuracy to ISO tolerance class 6
26. P52: P5 + C2
27. P62: P6 + C2
28. P63: P6 + C3
29. RS1: one side with a steel skeleton nitrile-diene rubber (NBR) contact seals
30. RSH: nitrile diene rubber side with a steel skeleton (NBR) contact seals
31. RSL: one side with a steel skeleton nitrile-diene rubber (NBR) low-friction seals
32. RZ: one side with a steel skeleton nitrile-diene rubber (NBR) low-friction seals
33. TH: fiber reinforced phenolic resin cage (card type)
34. TN: injection molded nylon cage
35. TN9: injection molding of glass fiber reinforced polyamide 6,6 cage
36. VL0241: the outer surface of the loop coated with alumina insulating capacity of up to 1000VDC
37. VL2071: the inner surface of the loop coated with alumina insulating capacity of up to 1000VDC
38. WT: Polyurea Grease, NLGI consistency 2, the temperature range of -40 to +160 degrees (standard filling amount)
39. Y: stamping brass cage
40. Z: side with stamped steel dust cover
The other side with a dust cover stamped steel outer ring with snap ring groove and stopper, stopper grooves: 41. ZNR
42. 2RS1: on both sides with a steel skeleton of nitrile rubber (NBR) contact seals keep ring
43. 2RSH: on both sides with a steel skeleton of nitrile rubber (NBR) contact seals keep ring
44. 2RSL: nitrile rubber bands on both sides of a steel skeleton (NBR) low-friction seal ring memory
45. 2RZ: nitrile rubber bands on both sides of a steel skeleton (NBR) low-friction seal ring memory
46. ​​2Z: on both sides with a stamped steel dust cover
47. 2ZNR: outer ring with snap ring groove and snap ring on both sides with a stamped steel dust cover
With filling gaps common suffix:
1. C3: radial clearance greater than Normal
2. N: outer ring with snap groove
3. NR: outer ring with snap groove even snap ring
4. Z: side with stamped steel dust cover
The other side with a dust cover stamped steel outer ring with snap ring groove and stopper, stopper grooves: 5. ZNR
6. 2Z: on both sides with a stamped steel dust cover
7. 2ZNR: outer ring with snap ring groove and snap ring on both sides with a stamped steel dust cover
Stainless suffix meaning:
1. R: outer ring with flange
2. VT378: non-toxic grease (incidental contact to food materials)
3. 2RS1: NBR rubber band on both sides of a steel skeleton (NBR) contact seals
4. 2Z: on both sides with a stamped steel dust cover
5. 2ZR: on both sides with a stamped steel dust cover and flanged outer ring